Precursors of aza-macrocycles: Characterization of substituted phenanthrolines and related bases. Crystal and molecular structure of dichloro-d i-n-butyl(2,2',6,6'-bipyrimidine)tin(IV)

The synthesis, characterization and 1~ NMR spectra of some substituted 1,lO-phenantrolines are described. These are precursors of azacyclophanes which are, along with their metal complexes, insoluble in polar solvents. It is suggested that the use of substituted 2,2’, 6,6’ -bipyrimidines as precursors would lead to soluble macrocycles. The crystal and molecular structure of dichloro-di-n-butyl(2,2’,6,6’-bipyr